/* --- Premium Bitcoin Portfolio Calculator (updated) --- */
:root{
  --color-primary-bg:#0a0a0a;
  --color-secondary-bg:#151515;
  --color-card-bg:#1f1f1f;
  --color-surface:#262626;
  --color-surface-2:#2d2d2d;
  --color-text:#fff;
  --color-muted:#cfcfcf;
  --color-dim:#9a9a9a;
  --color-accent:#F7931A;
  --color-bear:#EF4444;
  --color-base:#3B82F6;
  --color-bull:#10B981;
  --border:#333;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:linear-gradient(135deg,var(--color-primary-bg),var(--color-secondary-bg));color:var(--color-text);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
.app{max-width:1200px;margin:0 auto;padding:20px}
.header{margin-bottom:24px}
.header-content{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid rgba(247,147,26,.3)}
.header-title{font-weight:700;font-size:28px;text-shadow:0 0 8px rgba(247,147,26,.25)}
.header-controls{display:flex;gap:12px;align-items:center}
.currency-toggle{display:flex;align-items:center;gap:8px}
.toggle-label{color:var(--color-dim);font-size:13px}
.currency-switch{display:flex;background:var(--color-surface);border:1px solid var(--border);border-radius:12px;padding:4px}
.currency-switch input{display:none}
.currency-option{padding:6px 12px;border-radius:10px;cursor:pointer;font-weight:600;color:#c9c9c9;min-width:52px;text-align:center;transition:.2s}
.currency-switch input:checked + .currency-option{background:var(--color-accent);color:#121212}
.header-branding{color:var(--color-accent);font-weight:600;border:1px solid rgba(247,147,26,.3);border-radius:10px;padding:6px 10px;background:rgba(247,147,26,.08)}

.price-card{background:linear-gradient(135deg,#FFB84D,#F7931A);color:#101010;border-radius:20px;padding:18px 18px 12px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.price-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.price-title{font-size:20px;font-weight:700}
.price-status{display:flex;align-items:center;gap:6px}
.status-indicator{width:8px;height:8px;border-radius:9999px;background:#101010;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.price-display{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:8px 0 4px}
.price-item{background:rgba(0,0,0,.05);border-radius:12px;padding:10px;border:1px solid rgba(0,0,0,.08);display:flex;justify-content:space-between;align-items:center}
.price-item.active{box-shadow:inset 0 0 0 2px rgba(0,0,0,.12)}
.price-label{font-weight:700}
.price-value{font-feature-settings:"tnum" 1;letter-spacing:.2px;min-height:24px}
.loading-spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(0,0,0,.25);border-top-color:#000;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.last-updated,.price-note{font-size:12px;color:#1e1e1e;opacity:.9}

.section-title-row{display:flex;gap:8px;align-items:center;margin-top:22px}
.section-title{font-size:22px;margin:16px 0 10px}
.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.scenario-card{background:var(--color-card-bg);border:1px solid var(--border);border-radius:16px;padding:14px;cursor:pointer;transition:.18s;outline:none}
.scenario-card:hover{transform:translateY(-2px);background:var(--color-surface-2)}
.scenario-card.active{box-shadow:0 0 0 2px currentColor}
.scenario-card.bear{color:var(--color-bear)}
.scenario-card.base{color:var(--color-base)}
.scenario-card.bull{color:var(--color-bull)}
.scenario-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.scenario-title{font-weight:700}
.scenario-rate{font-weight:700;font-size:13px}
.scenario-description{color:var(--color-muted);font-size:13px}

.input-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.input-card{background:var(--color-card-bg);border:1px solid var(--border);border-radius:16px;padding:14px}
.input-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.premium-input{width:100%;padding:12px;border-radius:12px;border:1px solid var(--border);background:#111;color:#fff;font-size:15px;outline:none;transition:.15s}
.premium-input:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px rgba(247,147,26,.2)}
.input-wrapper{position:relative}
.input-suffix{position:absolute;right:10px;top:50%;transform:translateY(-50%);font-size:12px;color:#b9b9b9;pointer-events:none}
.input-help{margin-top:8px;color:#b9b9b9;font-size:12px}
.premium-toggle{display:inline-flex;align-items:center}
.premium-toggle input{display:none}
.toggle-slider{width:40px;height:22px;border-radius:9999px;background:#3a3a3a;position:relative;transition:.2s;display:inline-block}
.toggle-slider::after{content:"";width:18px;height:18px;position:absolute;top:2px;left:2px;border-radius:9999px;background:#fff;transition:.2s}
.premium-toggle input:checked + .toggle-slider{background:var(--color-accent)}
.premium-toggle input:checked + .toggle-slider::after{left:20px}
.dca-inputs{opacity:.6;transition:.2s}
.dca-inputs.enabled{opacity:1}

.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:10px}
.summary-card{background:var(--color-card-bg);border:1px solid var(--border);border-radius:16px;padding:14px}
.summary-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.summary-value{font-size:20px;font-weight:700}
.summary-return{font-size:13px;margin-top:6px}
.summary-return.positive{color:#56d364}
.summary-return.negative{color:#ff6b6b}

.chart-card{background:var(--color-card-bg);border:1px solid var(--border);border-radius:16px;padding:14px;margin-top:16px}
.chart-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.chart-container{position:relative;height:420px}
.chart-legend{display:flex;gap:12px;flex-wrap:wrap}
.legend-item{display:flex;gap:6px;align-items:center;font-size:13px;color:var(--color-muted)}
.legend-dot{width:10px;height:10px;border-radius:9999px;display:inline-block}
.legend-dot.bear{background:var(--color-bear)}
.legend-dot.base{background:var(--color-base)}
.legend-dot.bull{background:var(--color-bull)}
.legend-item .base.active,.legend-item .bear.active,.legend-item .bull.active{filter:brightness(1.2)}

.footer{margin:26px 0 8px}
.footer-content{color:#bdbdbd;font-size:13px}
.footer-brand{color:var(--color-accent)}

.inline-tip{display:inline-flex;align-items:center;position:relative}
.tip-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:9999px;background:rgba(255,255,255,.1);border:1px solid var(--border);font-size:12px;color:#fff;cursor:help}
.inline-tip:hover::after,.inline-tip:focus-within::after{content:attr(data-tip);position:absolute;left:50%;transform:translateX(-50%);bottom:125%;background:#0f0f0f;border:1px solid #333;padding:8px 10px;border-radius:10px;white-space:pre-line;min-width:220px;max-width:280px;box-shadow:var(--shadow);font-size:12px;color:#eaeaea;z-index:10}

.value-update{animation:bump .6s ease}
@keyframes bump{0%{transform:scale(.98);opacity:.85}60%{transform:scale(1.02)}100%{transform:scale(1);opacity:1}}

/* Mobile first tweaks */
@media (max-width: 980px){
  .input-grid{grid-template-columns:1fr 1fr}
  .summary-grid{grid-template-columns:1fr 1fr}
  .chart-container{height:360px}
}
@media (max-width: 640px){
  .header-content{flex-direction:column;align-items:flex-start;gap:10px}
  .price-display{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}
  .input-grid{grid-template-columns:1fr}
  .summary-grid{grid-template-columns:1fr}
  .chart-container{height:300px}
  .app{padding:14px}
  .currency-option{min-width:64px}
}